"Tell Archer that's two he owes me!"
Leftists threads are more abundant because they're more likely to suffer from a wide variety of mental illnesses then other groups of people while right wingers on the other hand just point out a lot of the problems in modern society but don't really have feasible solutions for them. They also tend to be stupid and some of them are grifters which isn't really as interesting as someone like say Moviebob.There are simply more leftists cows, because attention whores and the deranged pretend to be leftists to gain more power. Conservatism isn't usually the path of least resistance, so the supporters tend to be less mentally divergent. No crazy = no fun.
The rise of right-wing threads could be explained with people getting black pilled on the political system. No one wants more conservatives who have conserved nothing, and instead shill you some shitty mattresses where they can't even get their own wife's pussy wet.
The truth is that you don't really have to be either conservative or liberal to be able to notice the problems that right wingers point out on a daily basis.